H-RE
12Pages

HIGH PERFORMANCE COUPLINGS Installation, Operation & Maintenance Instructions General Specification John Crane’s torsionally rigid HSRE/HLRE/HTRE flexible coupling is a high-performance, dynamically balanced, low-moment coupling typically for use on high-speed mechanical drives (turbines, pumps, compressors). Additionally, it is designed to maintain the drive until the machinery can be safely brought to rest in the event of failure of the flexing elements. A general arrangement (GA) drawing is always supplied for high-performance couplings. These instructions are to be read in conjunction with the GA and any specific information on the drawing takes precedence over the general information included herein. NOTE: Throughout these instructions, the generic high-performance coupling code H-RE indicates HSRE, HLRE and HTRE. Extent of Supply The coupling will generally be supplied in the following configuration: • Factory-assembled coupling complete with hub-mounted membrane assemblies and spacer piece. The whole coupling will have been dynamically balanced for high-speed applications. • The hub/membrane units are delivered fitted with red-painted gagging bolts, to give protection during transportation and to aid installation of the coupling. These must be removed before running the coupling. • If requested the coupling can be supplied with a number of packing shims to allow the coupling length to be adjusted on site to suit the specific application. Refer to the specific GA drawing for details of the use of these shims. Selection Verification Although a coupling may be correctly specified at the time of order placement, the duty conditions can sometimes change prior to the coupling being put into service. Information is available from John Crane to advise on the selection and limitations of their power transmission products, but the user is ultimately responsible for verifying the suitability of the selection for the actual service conditions. The coupling and its manner of use must conform to any legal or licensing requirements and, where appropriate, meet local health and safety requirements. IMPORTANT If the conditions of operation are changed without approval from John Crane, then we would decline responsibility for any consequent damage and the user would assume all risks. Handling and Storage • Couplings and components should be stored in a dry building away from direct heat. • For maximum protection, the coupling and components should be stored in the original packaging. If any packaging has been removed or damaged in transit, it should be restored to a secure, safely packaged condition. • The coupling should be stored horizontally and should not be stood on end for long periods. Avoid shock during handling and protect against corrosion. • Always examine parts thoroughly when taking them from storage for signs of damage or deterioration. • During transport, handling and storage, the gagging bolts (painted red for identification) should be in position. • Following installation of the coupling, all transit gags and bolts should be tagged with the plant/coupling ID and stored ready for subsequent reuse on coupling removal, as should ancillary items such as spare shims. • Documentation supplied with the coupling should be retained fo

HIGH PERFORMANCE COUPLINGS Installation, Operation & Maintenance Instructions Installation of Coupling Inspect the coupling to ensure that it is undamaged and note any match marks that must be aligned when the coupling is installed. If assembled, remove the spacer stripper bolts and nuts and separate the spacer from the hub/membrane assemblies. DO NOT DISMANTLE THE MEMBRANE ASSEMBLIES. Prior to installing the coupling, ensure that the machinery is made safe. Hubs must be adequately supported during installation to avoid accidental damage should they slip. IMPORTANT Refer to the coupling...

HIGH PERFORMANCE COUPLINGS Installation, Operation & Maintenance Instructions Installation of Hubs (continued) 9. Inject oil between the component interface until the required mounting pressure is reached, or it leaks out at the ends of the mating surfaces. 10. By means of the mounting tools, draw the hub up the shaft to the correct axial position, injecting oil during this operation. NOTE: The correct pull-up distance should be shown on the GA drawing along with max. permissible installation pressure. 11. Release the interface oil pressure and leave equipment fitted for one hour to allow...

HIGH PERFORMANCE COUPLINGSInstallation of Coupling (continued) FIGURE 2. Gagging arrangement TABLE 1. Minimum Membrane Gap ‘X’ at Maximum Permissible Compression Membrane unit compression Before the spacer can be fitted between the membrane units, it is necessary to compress the membranes. The following instructions detail each membrane unit compression: • Remove the gagging sleeves (10) and refit gagging screws (11). • Align any match marks and support the spacer (3) in position between the hub/membrane units. NOTE: The gagging screws (11) may be used to compress the membrane units enough...

HIGH PERFORMANCE COUPLINGS Installation, Operation & Maintenance Instructions Operation ATTENTION Before starting the machinery, ensure that all necessary safety procedures are being observed. When operated within the duty conditions for which they were designed, HSRE/HLRE/HTRE couplings will give long and trouble-free service. It is recommended that the tightness of fasteners (4 and 6) are checked periodically. If the coupled machinery is disturbed at any time, the shaft alignment should be rechecked as a matter of routine. Alignment checking is also recommended if a deterioration of...

HIGH PERFORMANCE COUPLINGS Installation, Operation & Maintenance Instructions Hub Removal (continued) 3. Adapters • efer to the specific GA drawing for location and mounting details. R • ote position on shaft flange and any match markings. N • upport the weight of the adapter. S • emove the adapter stripper bolts. R • Tapped holes are provided in flanges to assist in breaking the spigot/recess fit. Maintenance and Inspection Under normal operating conditions, no servicing or maintenance should be necessary. Periodically, the bolts should be checked/ for tightness and the HUB MEMBRANE UNIT...